New Zealand rescuers sifted through rubble with bare hands on Wednesday, guided by sounds of crying and tapping as they looked for up to 100 people feared trapped in collapsed buildings after a quake shook Christchurch, killing at least 65 people.

(Reuters) - Research scientists announced on Monday they had identified the missing piece of a major puzzle involving the make-up of the universe by observing a neutrino particle change from one type to another.